How to embed an Image Stream to MailMessage

You can embed the image and skip working with resources by converting it to base64 instead:

public static string BitmapToBase64(Bitmap b)
{
   ImageConverter ic = new ImageConverter();
   byte[] ba = (byte[])ic.ConvertTo(b, typeof(byte[]));
   return Convert.ToBase64String(ba, 0, ba.Length);
}

and use it as html image src :

string logoimage="<img src='data:image/png;base64," + BitmapToBase64(logo) + "'>";

Note that converting to Base64 slighly increases the size of the image.

Ok i have solved the problem.

Instead of using the BitMap save method I converted the BitMap to Byte[] and gave the memory stream the Byte[]

Did not work :

 b.Save(logo, ImageFormat.Jpeg);

Did Work:

Bitmap b = new Bitmap(Properties.Resources.companyLogo);
ImageConverter ic = new ImageConverter();
Byte [] ba = (Byte[]) ic.ConvertTo(b,typeof(Byte[]));
MemoryStream logo = new MemoryStream(ba);

I think it has something to do with the Bitmap.Save method, in the MSDN lib it mentioned that the stream has to have an offset of 0.

Bitmap b = new Bitmap(Properties.Resources.companyLogo);
MemoryStream logo = new MemoryStream();
b.Save(logo, ImageFormat.Jpeg);

After you do the save, you have to "seek" the MemoryStream back to the start.

logo.Position = 0;